Hameg HM8112-3, Руководство пользователя

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45
Subject to change without notice
default
Starting / Stopping the data logger, dumping the test series
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6: LOGGER
MENU MENU
Start
Stop
Dump
Dumping the test series
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Dump
MENU ENTER Wert1 00001
00000
last setting
Interface RS-232: selecting the baud rate
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7: Com
MENU MENU
Rs19200
Rs9600
Off
Calibration
8: Cal
default
Math-Menu
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MENU MENU
5: Math Off
Lo Limit
Hi Limit
Offset
default
Scanner, choice of the channel
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MENU MENU
9: Mux
empty
Chanal 1
. . . .
Chanal 8
¬
ENTER Wert2 00002
¬
ENTER Wertn 0000n
¬
ENTER
MENU ESC
Storage End
¬
by or leaving menu
¬
This area is protected by password
Overview of menu structure – part 2
M e n u s t r u c t u r e
1st: Comp Ext/Ice
An external temperature test point acts as a reference, e.g. an
ice bath or another reference thermocouple with a temperature
of 0° C, connected with the closed end to the measuring point,
and the reference put into the ice bath. The closed end of the
thermocouples can be connected with standard measurement
cables to the terminals of the HM8112-3.
2nd: Comp PT-Front
The temperature measured with a platinum sensor is the
reference for the measurement used with the thermocouples.
If several thermocouples will be attached to the HM8112-3 via
a scanner, the use of the ice bath would be necessary for each
thermocouple. To overcome this, the ambient temperature or
even a source with a constant temperature is taken as the
reference (e.g. ice bath, heated reference). If “PT-Front“ is
seleced by pressing MENU
18
the function
ϑ
PT will be
activated. Now 2- or 4-wire measurement can be chosen. Then
the reference temperature is measured with a platinum sensor
and assumed by confirmation with button MENU
18
. In case
of 2-wire measurement the PT-sensor can stay connected to
the thermocouple. For 4-wire measurement it has to be dis-
connected and replaced by the connection of the thermocouple.
3rd: Comp 23° C/ °F
A temperature of 23° C is specified as reference. For measure-
ments of high temperatures the resulting measurement error
can be neglected, unless the open end of the thermocouple is
on the level of the ambient temperature. The ambient tem-
perature should be about 23° C.
4:Info
In this menu item all instrument information is available:
Version:
Display of revision number of the software
Ser-Nr: Display of the intrument’s serial number
Cal date: Display of the date of the last calibration.
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